Terminal-fastening.



TiNTTnn sTaTns raTnNT onirica,

ALBERT SCHMIDT, or FLINnjMICHIGAN," estanca To CHAMPION IGNITIONCOMPANY,

or FLINT, MICHIGAN, a oonronnrion or MICHIGAN.

'rnnmnanrnsrnnme Speecation of Letters atent.

Application filed February 7, 1910. Serial No. 542.393.

To all 107mm it may concern. Be it known that I, ALBERT SCHMIDT, acitizen of the United States ot' America, residing at Flint7 in thecount-y of Genesee and State of Michigan7 have invented certain new anduseful Improvements in Tet`- y minal-Fastenings, ot which the 'followingis i of the fastening upon said part.

The invention consists in the construction as hereinafter moreiullydescribed and-particularly set forth in the claims reference being hadtothe accompanying drawing` in which,

Figure 1 is a side elevation of a spark plug and a terminal fasteninembodying the invention shown detache therefrom; Fig. 2 is a sectionalvieW of the terminal fastening; Fig. 3 a detail of' the eye bolt showingthe same in section; and Fig. 4 is a similar view showing the eye boltsec tioned at right angles to the section shown in F ig. 3.

`Wln1e the terminal embodying thc invention is shown as applied to aspark plug, it is not desired to limit the scope of the invention tosuch applicatioin but it is undern stood that the fastening may beapplied to any device having a terminal post o1" stem l which isprovided With an annular groove 2.

The fastening consists of a plug 3 provided vvith an axial bore which isscrewthreaded to receive the scrcwthrcadcd stem 4 of an eye bolt '5, theeye 6 of which is just large enough to receive the stem l of the sparkplug which `stem is preferably rounded at its upper end to facilitateits lnsertion in the eye 6. The bolt is split horizontally lby sawinginward from the outer end of the free ends of the airing adjacent to theouter slightly intethe vertical'hele in the eye for thc reception of thestem l. The looped end or' this spring is secured within the shankportion of the eye bolt by depressing the metal of the bolt at 10 bymeans of a punch, downward into the. loop. The ends or portions 9 of thespring are free to spring outward to permit theinsertion of the stem land when the eye is brought to alpoint on the stem opposite thek groove2 therein the spring Will move into the groove and de tachably hold theeye in place on the stem. The spring iirmly engages the groove and makesa good electrical connection and at he same time permits the eyeI boltto be turned freely upon the stem or the stem lto be turned Within theeye holt.. rl`he end of the wire conductor 1l isattached to the plug @bysecuring the plug Within the end of an insulating sleeve l2, the`opposite end ot' which sleeve forms a socket to receive the end of theWire which is inserted therein and an electricalvconnection made betweenthe Wire and the plug 3 by ruiming solder into the sleeve around theWire and upon the end of the plum Ii' desired the bore of the plug maybe extended therethrough and the end of thewire inserted in the innerend of said borel as shown at 13 in Fig. 2 to further insure a goodelectrical connection..

Havingthus fully described my invention What 'I claim is:-

l. The combination of a terminal stem having a groove. an eye to receivethe stem adapted to be attached to an electrical conductor. and a springsecured to the eye and normally projecting `intlo the opening thereol toengage the `uroovein said stein.

The combination of a terminal stem vhavingr a groove, an eye boltadapted to re ceive the stem, means for attaching the eye bolt. to anelectrical conductor-,and a spring on the eye bolt to engage the groovein the stem and detachably'hold the eye bolt in place thereon.

3. The combination of a terminal stem having an annular groove, an eyebolt having an opening to receive the stem and a transverse slot, meansfor attaching the eye bolt to an electrical conductor, and a. springsecured within the slot in the eye bolt'to engage the groeve in thestern.`

Il. The combination of a terminal stem having an annular groove,` an eyebolt havlatent'ed Nov. i5, Matti.

ice

ing an opening to receive the stern andhavf-i like, outer end of the eyeof the bolt, a U- shaped spring secured Williin said slot with y ltoward the 'shank port-ion, a U-shaped spring" and n slot: extending'transversely of ille,

mening ifrnn` ille outer end o'l linz qw secured Within the slot withit's end portions normally/'projecting into the opening, a plug 15loving an axially screw threaded o eningto receive the siem of the eyebolt', m5, e sleeve Within one end of which the plug i secured.

ln testimony whereof I affix my signature n preeence of two Witnesses.

ALBERT SCHMIDT. Vf i messes S. CHAMPION, B. DE GUICHARD.

